Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4CIF callsign genealogy
Currently held by Febus, Carlos I
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4CIF's current licensee, walking backwards.
- Febus, Carlos ITXgranted 2018-02-27cancelled 2020-03-31
Successor callsigns
Callsigns held now by people who previously held K4CIF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4CIF, oldest first.
- NIXON, GEORGE S FL2002-09-10 → cancelled 2014-12-02
- Febus, Carlos I TX2020-03-31 active